== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:48:38 (1749606518)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.43732 s, 43.0 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff8800b62a1800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.53543
Iter 1/10: OSS cache speed: 1.85279
Iter 1/10: ladvise speed: 1.81301
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.50454
Iter 2/10: OSS cache speed: 2.86142
Iter 2/10: ladvise speed: 3.48284
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.38639
Iter 3/10: OSS cache speed: 2.97871
Iter 3/10: ladvise speed: 2.62917
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.1469
Iter 4/10: OSS cache speed: 2.19918
Iter 4/10: ladvise speed: 2.02287
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.54194
Iter 5/10: OSS cache speed: 1.77175
Iter 5/10: ladvise speed: 1.95976
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.55895
Iter 6/10: OSS cache speed: 1.99725
Iter 6/10: ladvise speed: 1.71358
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.64068
Iter 7/10: OSS cache speed: 2.20845
Iter 7/10: ladvise speed: 2.13555
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.15602
Iter 8/10: OSS cache speed: 2.72099
Iter 8/10: ladvise speed: 2.27376
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.69349
Iter 9/10: OSS cache speed: 3.04594
Iter 9/10: ladvise speed: 3.0052
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.82931
Iter 10/10: OSS cache speed: 3.23503
Iter 10/10: ladvise speed: 3.20658
Average uncached read: 1.99
Average speedup with OSS cached read:  2.48 = +24%
Average speedup with ladvise willread:  2.42 = +21%
fail_loc=0